Title :
Far-Field RF-Powered Variable Duty Cycle Wireless Sensor Platform
Author :
Falkenstein, Erez ; Costinett, Daniel ; Zane, Regan ; Popovic, Zoya
Author_Institution :
Dept. of Electr., Univ. of Colorado at Boulder, Boulder, CO, USA
Abstract :
This brief discusses a low-power wireless sensor based on commercial components for sensing and data transmission. The sensor is wirelessly powered from the far field through an integrated single or dual-polarization antenna, rectifier, and power management module. Since the unit is intended for mobile use, the variable available power is monitored, and the duty cycle for wireless data transmission adaptively adjusted through the use of a low-power microcontroller and a custom power management circuit. In sleep mode, the circuit consumes 1 μA at 2.5 V.
Keywords :
low-power electronics; microcontrollers; wireless sensor networks; current 1 muA; dual-polarization antenna; duty cycle; integrated single antenna; low-power microcontroller; low-power wireless sensor; power management module; rectifier; sleep mode; variable available power; voltage 2.5 V; wireless data transmission; Batteries; Power distribution; Radio frequency; Rectennas; Wireless communication; Wireless sensor networks; Power management; radio frequency (RF); rectifier; wireless powering; wireless sensors;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2011.2173964
